Concept:A lightning conductor is a metal rod mounted on top of a building and connected to the ground to safely divert lightning away from the structure.
Explanation:Statement 1: A lightning conductor does not create an electric field on its own; it simply provides a preferred path for the lightning strike.
So statement 1 is false.
Statement 2: The discharge during lightning is sudden and not uniform; the conductor does not uniformly distribute charge over the building.
So statement 2 is false.
Statement 3: The conductor carries all the lightning current deep into the earth, preventing damage to the building.
So statement 3 is true.
Statement 4: The conductor must be taller than the building so that lightning strikes the rod first, avoiding direct contact with the roof.
So statement 4 is true.
Therefore, only statements 3 and 4 are correct.
Answer:B. 3 and 4 only